I agree that God permitted evil. I'm not entirely sure what you mean by, '....with much suffering to Himself'.
Genesis 6. states
5 And God saw that the wickedness of man was great in the earth, and that every imagination of the thoughts of his heart was only evil continually.
6 And it repented the Lord that he had made man on the earth,
and it grieved him at his heart.
7 And the Lord said, I will destroy man whom I have created from the face of the earth; both man, and beast, and the creeping thing, and the fowls of the air;
for it repenteth me that I have made them.
Was God grieved ?
Did God predestine himself to be Grieved ?
Did God predestine every imagination and thoughts of man's heart to be evil continually ?
Did God make one huge fowl up that he repenteth of ?
Answer - Yes
1. What was the point of grieving himself ?
2. Who is this story aimed at if man is created/predestined by God to be evil continually.
3. Why does the Bible tell man to repent if they cannot as God made them to be evil continually.
4. What is the point of the great commission. Why does anyone bother to evangelize ?
5. Gen 6.12 "12 And God looked upon the earth, and, behold, it was corrupt;
for all flesh had corrupted his way upon the earth." Who corrupted his way ? Man or God ? When, at Creation or what this verse says ?. Is this one of many verses that has got it so wrong.
6. Gen 6:13 ".... and, behold, I will destroy them with the earth. Oh dear, oh dear, what a silly God. He wipes out man then has another go and what happens ? Third time lucky maybe. Is this what you believe ?
7. And so on....
Answer - No
Correct. Read the rest of the Bible to confirm.
I suppose the Calvinist's concern would be if were possible that the evil permitted could lead to God's defeat? If the free will permitted is to be truly free then would that include the possibility that God's plan could be thwarted? Was God overriding man's free will when various attempts were made by the Jews to seize Jesus (before the time appointed had come)?
John 10:39
Again they tried to seize him, but he escaped their grasp.
You have answered your own question with
If the free will permitted is to be truly free. Find a non calvinist scholar who has ever made this ridiculous claim. Is God infinite ? Obviously yes. Is man infinite ? obviously no. Ok you might find some cranks on both sides who talk blatant drivel but not any respected theologian.
Calvinist Charles Spugeons's sermon 1516 is a good read. "Both sides ( Gods Sovereignty vs man's free will ) are in Holy writ and so must I preach both" he said. Could he figure out the paradox ? Read it for yourself.
Maybe bin the Bible as it seems so contradictory and divisive. After all look what science has achieved. Look at the inroads that mathematicians have made on the subject of infinity ( Google George Cantor). Are the likes of Dawkins correct after all - man is just a mechanistic process. Not random, not free in any measure but totally deterministic.